Lua module system concept

moduleManager.lua

-- module system
if not Game.modules then
	-- load
	Game.modules = {
		moduleList = {},
		unLoadedModuleList = {}
	}
else
	-- reload
	local newModuleList = {}
	for moduleName, moduleData in pairs(Game.modules.moduleList) do
		if moduleData.enabled then
			Game.modules.callModuleFunction(moduleName, "onUnLoad")
		else
			newModuleList[moduleName] = nil -- disabled
		end
	end
	
	Game.modules.moduleList = newModuleList
end

function Game.modules.registerModule(module)
	if Game.modules.moduleList[module.name] and not Game.modules.moduleList[module.name].enabled then
		return
	end
	
	Game.modules.moduleList[module.name] = module
	Game.modules.callModuleFunction(module.name, "init")
	Game.modules.callModuleFunction(module.name, "onLoad")
	return true
end

function Game.modules.disableModule(moduleName)
	if Game.modules.moduleList[moduleName] and Game.modules.moduleList[moduleName].enabled then
		Game.modules.callModuleFunction(moduleName, "onUnLoad")
		Game.modules.unLoadedModuleList[moduleName] = Game.modules.moduleList[moduleName]
		Game.modules.moduleList[moduleName] = nil -- disabled
		return true
	end
end

function Game.modules.loadModule(moduleName)
	if Game.modules.unLoadedModuleList[moduleName] then
		Game.modules.moduleList[moduleName] = Game.modules.unLoadedModuleList[moduleName]
		Game.modules.callModuleFunction(moduleName, "onLoad")
		Game.modules.unLoadedModuleList[moduleName] = nil
		return true
	end
end

function Game.modules.unLoadModule(moduleName)
	if Game.modules.moduleList[moduleName] and Game.modules.moduleList[moduleName].enabled then
		Game.modules.unLoadedModuleList[moduleName] = Game.modules.moduleList[moduleName]
		Game.modules.callModuleFunction(moduleName, "onUnLoad")
		Game.modules.moduleList[moduleName] = nil
		return true
	end
end

function Game.modules.callModuleFunction(moduleName, address, ...)
	if Game.modules.moduleList[moduleName] and Game.modules.moduleList[moduleName].enabled and Game.modules.moduleList[moduleName][address] then
		return Game.modules.moduleList[moduleName][address](...)
	end
end

sampleModule.lua

-- sample module
local module = {
	name = "sampleModule",
	version = "1.0",
	author = "Zbizu",
	URL = "https://github.com/Zbizu",
	enabled = true,
	description = "This is a sample module."
}

module.init = function()
	-- run once on startup
	local ec = EventCallback
	ec.onLook = function(self, thing, position, distance, description)
		return Game.modules.callModuleFunction(module.name, "exampleMethod", self, thing, position, distance, description) or description
	end
	ec:register()
end

module.onLoad = function()
	-- run on startup and on every reload
end

module.onUnLoad = function()
	-- run when module is about to be unloaded
end

module.exampleMethod = function(self, thing, position, distance, description)
	if self:getGroup():getAccess() then
		return description .. "\nThis text comes from sample module. Only access players can see it. Go to data/scripts to disable."
	else
		return description
	end
end

Game.modules.registerModule(module)